Hi @Japhy , here is the system info. The bug is happening in every file, that I opened or created after update to 8.20 to every new surface/polysurface. SubDs are ok before I convert it to nurbs…
system info
Rhino 8 SR20 2025-5-13 (Rhino 8, 8.20.25133.14002, Git hash:master @ 007e608777fd819d8976799b8426698dff88c962)
License type: Commercial, build 2025-05-13
License details: Cloud Zoo
Apple macOS Version 12.7.5 (Build 21H1222) (Physical RAM: 32GB)
Mac Model Identifier: MacBookPro16,1
Language: en-CZ (MacOS default)
.NET 8.0.14
Metal GPU Family Apple 0
Metal GPU Family Common 3
Metal GPU Family Mac 2
Graphics processors
Intel UHD Graphics 630 (1536 MB)
AMD Radeon Pro 5300M (4 GB)
Color LCD (1792 x 1120 @ 59.00Hz)
GPU Vendor: AMD
USB devices
Apple: composite_device
Apple Inc.: Touch Bar Backlight
Apple Inc.: Touch Bar Display
Apple Inc.: Apple Internal Keyboard / Trackpad
Apple: Headset
Apple Inc.: Ambient Light Sensor
Apple Inc.: FaceTime HD Camera (Built-in)
Apple Inc.: Apple T2 Controller
Bluetooth devices
None
Third party kernel extensions
None
Third party plugins
/usr/lib/swift/libswiftAppKit.dylib
/usr/lib/swift/libswiftCore.dylib
/usr/lib/swift/libswiftCoreData.dylib
/usr/lib/swift/libswiftCoreFoundation.dylib
/usr/lib/swift/libswiftCoreGraphics.dylib
/usr/lib/swift/libswiftCoreImage.dylib
/usr/lib/swift/libswiftDarwin.dylib
/usr/lib/swift/libswiftDispatch.dylib
/usr/lib/swift/libswiftFoundation.dylib
/usr/lib/swift/libswiftIOKit.dylib
/usr/lib/swift/libswiftMetal.dylib
/usr/lib/swift/libswiftObjectiveC.dylib
/usr/lib/swift/libswiftQuartzCore.dylib
/usr/lib/swift/libswiftXPC.dylib
/usr/lib/swift/libswift_Concurrency.dylib
/usr/lib/swift/libswiftos.dylib
/usr/lib/swift/libswiftCloudKit.dylib
/usr/lib/swift/libswiftCoreLocation.dylib
/usr/lib/swift/libswiftCryptoTokenKit.dylib
/usr/lib/swift/libswiftContacts.dylib
/usr/lib/swift/libswiftAccelerate.dylib
/usr/lib/swift/libswiftCoreAudio.dylib
/usr/lib/swift/libswiftCoreML.dylib
/usr/lib/swift/libswiftCoreMedia.dylib
/usr/lib/swift/libswiftOSLog.dylib
/usr/lib/swift/libswiftVision.dylib
/usr/lib/swift/libswiftsimd.dylib
/usr/lib/swift/libswiftNetwork.dylib
/usr/lib/swift/libswiftDemangle.dylib
/usr/lib/swift/libswiftFileProvider.dylib
/usr/lib/swift/libswiftIntents.dylib
/usr/lib/swift/libswiftPrivate_BiomePubSub.dylib
/usr/lib/swift/libswiftPrivate_BiomeStreams.dylib
/usr/lib/swift/libswiftUniformTypeIdentifiers.dylib
/usr/lib/swift/libswiftAVFoundation.dylib
/usr/lib/swift/libswiftCoreMIDI.dylib
/Users/morris/Library/Application Support/McNeel/Rhinoceros/packages/8.0/SubstanceImporter/2.0.7/libSubstanceImporter.dylib
/Users/morris/Library/Application Support/McNeel/Rhinoceros/packages/8.0/SubstanceImporter/2.0.7/libsubstance_ogl3_blend.9.dylib
/Users/morris/Library/Application Support/McNeel/Rhinoceros/packages/8.0/SubstanceImporter/2.0.7/libsubstance_linker.9.dylib
/usr/lib/log/liblog_network.dylib
Rhino plugins that do not ship with Rhino
/Users/morris/Library/Application Support/McNeel/Rhinoceros/packages/8.0/SubstanceImporter/2.0.7/SubstanceImporter.rhp “SubstanceImporter” 2.0.7.0
/Users/morris/Library/Application Support/McNeel/Rhinoceros/8.0/MacPlugIns/RadialMenu.rhp “RadialMenu” 1.0.0.0
Rhino plugins that ship with Rhino
/Applications/Rhino 8.app/Contents/Frameworks/RhMaterialEditor.framework “Renderer Development Kit” 8.20.25133.1002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/Commands.rhp “Commands” 8.20.25133.14002
/Applications/Rhino 8.app/Contents/PlugIns/NamedSnapshots.rhp “Snapshots” 8.20.25133.1002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RDK_EtoUI.rhp “RDK_EtoUI” 8.20.25133.14002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/MeshCommands.rhp “MeshCommands” 8.20.25133.14002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoRenderCycles.rhp “Rhino Render” 8.20.25133.14002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCycles.rhp “RhinoCycles” 8.20.25133.14002
/Applications/Rhino 8.app/Contents/PlugIns/AnimationTools.rhp “AnimationTools” 8.20.25133.1002
/Applications/Rhino 8.app/Contents/PlugIns/SectionTools.rhp “SectionTools” 8.20.25133.1002
/Applications/Rhino 8.app/Contents/PlugIns/Displacement.rhp “Displacement” 8.20.25133.1002
/Applications/Rhino 8.app/Contents/PlugIns/PanelingTools.rhp “PanelingTools” 8.20.25133.1002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoDLR_Python.rhp “IronPython” 8.20.25133.14002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/GrasshopperPlugin.rhp “Grasshopper” 8.20.25133.14002
/Applications/Rhino 8.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCodePlugin.rhp “RhinoCodePlugin” 8.20.25133.14002